Issue |
Rev. Fr. Geotech.
Number 134-135, 2011
|
|
---|---|---|
Page(s) | 75 - 85 | |
DOI | https://doi.org/10.1051/geotech/2011134075 | |
Published online | 06 October 2017 |
Intégration des contraintes ferroviaires dans les chantiers de mise au gabarit de tunnels
Integration of railways constraints during works for enlarging railways tunnels gauges
SNCF Direction de l’ingénierie Département des ouvrages d’art 6, avenue François-Mitterrand 93574 La Plaine Saint-Denis Jean-claude.daumarie@sncf.fr Christine.thuaud@sncf.fr, France.
L’évolution des transports et en particulier des transports de fret, conduit à prévoir, pour les tunnels ferroviaires, des gabarits de plus en plus grands. Les tunnels du patrimoine français, construits il y a plus de 100 ans, ne dégagent pas ces nouveaux gabarits et doivent donc être agrandis, au moyen de travaux de rescindement de leurs structures notamment. Ces travaux doivent se dérouler en perturbant le moins possible la circulation des trains. C’est pourquoi les études géotechniques doivent tenir compte non seulement des propriétés des sols ou roches environnant le tunnel, mais aussi de ces contraintes ferroviaires. Ces contraintes sont décrites dans cet article en présentant la modélisation de différentes phases des travaux avec des sollicitations correspondantes.
Abstract
Evolution of transportations, especially freight transportation, leads to forecast bigger and bigger gauges for railway tunnels. French tunnels built more than 100 years ago do not allow these new gauges and have to be enlarged with works such as localised reaming. These works have to be carried out without significantly affecting the normal traffic. That is why geotechnical investigations have to take into account not only the properties of soils or rocks that surround the tunnel, but also the different railway constraints. These constraints are described in this paper by presenting the modelling of different work phases with the corresponding loads.
Mots clés : tunnels ferroviaires / gabarits / rescindement / phasage / modélisation / calculs aux éléments finis
Key words: railway tunnels / gauges / splitting / work phases / modeling / finite elements method
© CFMS-CFGI-CFMR-CFG 2011
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